PORTABLE ELECTRONIC DEVICE, PARTICULARLY ELECTRONIC CARD WITH OPTICAL SWITCH Russian patent published in 2015 - IPC G06K19/73 H03K19/175 

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to portable electronic devices, particularly electronic cards with a switch which is actuated by a user in order to activate an electronic unit. The technical result is achieved through a portable electronic device which includes an electronic unit and a switch which is associated with the electronic unit, wherein said switch includes two independent photodetectors which receive light on the same surface of the portable electronic device and which are sufficiently far from each other to enable the user to cover one photodetector with one finger, and a logic circuit to which first and second illumination signals are transmitted, said signals coming from the two photodetectors, respectively, and if the first and second illumination signals correspond to different logic states, triggers the switch.

EFFECT: preventing accidental triggering of the switch of the electronic card owing to the arrangement of photodiodes and the logic circuit structure.

9 cl, 7 dwg